﻿/*
 * Copyright (c) 2015-2016 Constantijn Evenhuis (blueprints@const.nl)
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
using Blueprints.Resolution;
using System;
using System.Collections.Generic;

namespace Blueprints.Defaults
{
    internal abstract class PropertyBucket
    {
        private readonly List<IPropertyDescriptor> properties;
        private readonly Dictionary<string, object> values = new Dictionary<string, object>(StringComparer.Ordinal);

        public PropertyBucket(IObjectDescriptor descriptor, object instance)
        {
            List<IPropertyDescriptor> properties = new List<IPropertyDescriptor>(descriptor.RequiredProperties.Count + descriptor.OptionalProperties.Count);
            properties.AddRange(descriptor.RequiredProperties);
            properties.AddRange(descriptor.OptionalProperties);
            this.properties = properties;
            Instance = instance;

            foreach (IPropertyDescriptor property in properties)
            {
                values[property.Name] = property.GetValue(instance);
            }
        }

        public PropertyBucket(IObjectDescriptor descriptor)
        {
            List<IPropertyDescriptor> properties = new List<IPropertyDescriptor>(descriptor.RequiredProperties.Count + descriptor.OptionalProperties.Count);
            properties.AddRange(descriptor.RequiredProperties);
            properties.AddRange(descriptor.OptionalProperties);
            this.properties = properties;
        }

        public object Instance
        {
            get;
            private set;
        }

        public bool ShouldSerializeValue()
        {
            foreach (IPropertyDescriptor descriptor in properties)
            {
                object value;
                if (!values.TryGetValue(descriptor.Name, out value))
                {
                    continue;
                }

                if (descriptor.ShouldSerializeValue(Instance, value))
                {
                    return true;
                }
            }

            return false;
        }

        public void ApplyTo(object propertyValue)
        {
            foreach (IPropertyDescriptor descriptor in properties)
            {
                object value;
                if (!values.TryGetValue(descriptor.Name, out value))
                {
                    continue;
                }

                descriptor.SetValue(propertyValue, value);
            }
        }

        public object GetValue(IPropertyDescriptor property)
        {
            object value;
            if (values.TryGetValue(property.Name, out value))
            {
                return value;
            }

            return property.GetValue(Instance);
        }

        public void SetValue(IPropertyDescriptor property, object value)
        {
            values[property.Name] = value;
        }
    }
}
